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Finding the Fourth Proportional to 1,050.87, 1,449.96 and 631.08

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Solution

The fourth proportional to 1,050.87, 1,449.96 and 631.08 is: 870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.87 : 1,449.96 = 631.08 : x
  2. Step 2: Convert to fraction form
    1,050.87/1,449.96 = 631.08/x
  3. Step 3: Cross multiply
    1,050.87x = 1,449.96 × 631.08
  4. Step 4: Simplify right side
    1,050.87x = 915,040.76
  5. Step 5: Solve for x
    x = 915,040.76/1,050.87
  6. Step 6: Final answer
    x = 870.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.